The stock tires on the Gen IV ACR should be replaced for "driving around town". They do not track well on any surface that is not flat and smooth like a race track; are, in my opinion, not safe in the rain, and do not last very long because they are made out of a softer compound to increase stickiness on the track. The ACR is also slower. The 2008 and 2009 ACR have a top speed of 177. The 2010ACR has a top speed of 184. The regular Gen IV coupe has a top speed of 202.
I have the drive by wire in my Jeep and my Challenger. We have tweeked the programming as much as we can to try to elimininate the microsecond delay that can occur between pedal push and engine reaction. I still hate it although the Challenger is the better of the two. Whoever designed it needs to go back to the drawing board and create one that is truely instantaneous and more accurate. ( There has to already be a more accurate and sensitive one since new jetliners use a similar system.) There seems to be some kind of interaction between it and the controller adaptives so that the same degree of pedal input does not always seem to result in the same reaction.
My modded Gen III Viper has a mechanical throttle. It is accurate and precise. It is a pleasure. That's the way it should be. Hopefully, the Gen V will be just as precise.
The Gen II brakes, as mentioned above, were awful. They were not adequate for the car except for quiet cruising to the nursing home.
The clamshell hood was neat looking but a bit cumbersome to handle when working on the car by yourself. You also had to be careful of wind while it was up. It was like a giant hand catching the wind.
The Gen II interior was OK but the center console had a bad habit of cracking. The cheap rug like material on the door panels also tended to fuzz up and had to be shaved. The door hinges were crap. They sagged over time. This required door adjustments and eventual hinge replacement. Because of this, the rubber door liners/insulation also wore out and had to be replaced. The wires in the wiring bundle that went from the car into the door, after so many door openings and closings, start to break. Then you have to open it up, find which one has the problem and splice it - a pita.
The Gen II has rear exhauster vents located on both sides of the trunk. Over time they deteriorate since they are made of rubber. When they do, exhaust fumes can get into the car. They can be replaced but, once again, it is a pita. Access is tight.
The Gen II gauge placement is superior. It is not necessary to look down in order to check all the gauges. For daily driving, it makes no difference but for spirited driving, it is important to be able to see all the gauges without looking down.
The Gen II stock shifting mechanism ( not the ball and shaft - what is under it) was crap. It was not precise. The Gen IV mechanism is better and the MGW/Woodhouse mechanism is best.
The quality of the paint on all current generations leaves much to be desired. The clear coat is cheap and soft. It needs to be upgraded and I hope it is on the Gen V. Although My Gen III has better fit and finish than my Gen II did.
The battery placment on the Gen II is awful. It is a major pita to gain access to the battery. The battery access on the Gen III and Gen IV is simple and direct.
Clutch feel is subjective but I liked the Gen II clutch feel better than the clutch feel on the Gen IV's I have driven. I like a heavier clutch feel. I was going to swap out my Gen III clutch for the Gen IV clutch ( I still have the new parts) but I changed my mind after driving a Gen IV.
The Gen II tires and the Gen III stock run craps did/do not hold a candle to the Gen IV PS2s. The PS2s are fabulous tires.
Aerodynamics: The Gen II had a serious flaw. Over about 125 MPH, the front would lift too much and steering got very light - not that safe. I fixed the problem in mine by installing the Roe front fascia air duct. It worked perfectly to cure the problem and gave the front a bit meaner look at the same time.
Style: After I had my Gen III for a few months, something changed in my perception of the Gen II. It became a clown shoe like caricature to me. I now basically think it looks sort of over the top and a bit silly. The Gen III and IV, which are the same design except for the hood, when slightly lowered ( 3/4 inch front, 1/2 inch back) really wake up. No offense meant to those who love the Gen II design. This is a subjective area.
So in answer to your question, I do not regret the change and I do not miss the Gen II.
I hope the above is helpful to you.
Great point, Ray. 2,900 miles for 8 years is only 362/yr, but I bought in 08 with 700 miles and have put 2,200 in 2 years so I do get to drive it more than the odometer shows. These answers have all been helpful. I think the ACR is incredible, but may be over the top for cruising around town, no? ACR owners??? Do any of you just have for fun, or are all of you tracking a few times per year?.